Before syngas from gasification of biomass could be used as synthesis fuel or chemical feedstock, it requires the removal of hydrogen sulfide (H₂S) to meet the purity standard level of those applications. In this study, Zn-Fe/Al₂O₃ were successfully synthesized by a microwave-assisted wet incipient impregnation technique for use as adsorbent for H₂S removal. The characterization of synthesized adsorbents showed that the oxide form of Zn and Fe present on the surface of adsorbents were zinc oxide (ZnO), magnetite (Fe₃O₄), and zinc ferrite (ZnFe₂O₄). While the reduction of adsorbent was mostly due to that of iron oxide. The reduced adsorbents might consist of ZnO/Fe₃O₄/FeO/Fe on alumina as support. At relatively high space velocity (26,000 h⁻¹) the adsorbents were able to reduce the H₂S concentration from 250 ppm at the inlet to around 45 ppm, 35 ppm, and 25 ppm at the outlet by adsorbent 1ZnFe, 2ZnFe, and 3ZnFe; respectively. The removal efficiency for adsorbent 1ZnFe, 2ZnFe, and 3ZnFe were 82%, 86%, and 90%; respectively. Results also shown an increase in adsorbent lifetime with the increase of the Zn to Fe ratio.

在将生物质气化产生的合成气用作合成燃料或化学原料之前，需要去除硫化氢 (H ₂ S) 以满足这些应用的纯度标准水平。在这项研究中，Zn-Fe/Al ₂ O ₃通过微波辅助湿式初始浸渍技术成功合成，用作吸附剂去除H ₂ S。合成吸附剂的表征表明吸附剂表面存在的Zn和Fe的氧化物形式为氧化锌（ZnO）、磁铁矿（Fe ₃ O ₄）和铁酸锌（ZnFe ₂ O ₄）。而吸附剂的减少主要是由于氧化铁的减少。还原的吸附剂可能由氧化铝载体上的 ZnO/Fe ₃ O ₄ /FeO/Fe 组成。在相对较高的空速 (26,000 h ^-1 ) 下，吸附剂能够通过吸附剂 1ZnFe、2ZnFe 和 3ZnFe将 H ₂ S 浓度从入口处的 250 ppm降低到出口处的约 45 ppm、35 ppm 和 25 ppm ; 分别。吸附剂1ZnFe、2ZnFe、3ZnFe的去除效率分别为82%、86%、90%；分别。结果还显示吸附剂寿命随着锌铁比的增加而增加。